List four kinds of evidence that can provide data about past climates
What will be an ideal response?
tree rings, soil layers, ice cores, ocean sediments, pollen, corals
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Compared to long-term historic changes in the average temperature of the atmosphere, which of these best characterizes the current warming trend?
A. rapid B. slow C. very similar D. non-existent, the earth is cooling
The fact that meat accounts for one-third of all protein intake in developed countries but only one-tenth in developing ones suggests
A) developing nations are vegetarians by choice. B) there is a cultural taboo against meat in developing nations. C) developed nations can afford more meat per capita. D) developing nations do not have sufficient grazing land. E) developed nations do not produce sufficient grains to replace meat consumption.
An alluvial terrace is evidence of aggradation
Indicate whether the statement is true or false
Among the listed climatic factors, which would have the least effect upon a terrestrial ecosystem?
a. temperature variations b. wind c. conditions of sunlight d. availability of water